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	Provedor de dados Genet. Mol. Biol. (1) Autor Foresti,Fausto (1) Oliveira,Claudio (1) Pansonato-Alves,José Carlos (1) Palavra-chave 18S rDNA (1) 5S rDNA (1) Characidium (1) Heterochromatin (1) Natural triploidy (1) Tipo do documento Info:eu-repo/semantics/article (1) Ano 2011 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Karyotypic conservatism in samples of Characidium cf. zebra (Teleostei, Characiformes, Crenuchidae): physical mapping of ribosomal genes and natural triploidy Genet. Mol. Biol. Pansonato-Alves,José Carlos; Oliveira,Claudio; Foresti,Fausto. Basic and molecular cytogenetic analyses were performed in specimens of Characidium cf. zebra from five collection sites located throughout the Tietê, Paranapanema and Paraguay river basins. The diploid number in specimens from all samples was 2n = 50 with a karyotype composed of 32 metacentric and 18 submetacentric chromosomes in both males and females. Constitutive heterochromatin was present at the centromeric regions of all chromosomes and pair 23, had additional interstitial heterochromatic blocks on its long arms. The nucleolar organizer regions (NORs) were located on the long arms of pair 23, while the 5S rDNA sites were detected in different chromosomes among the studied samples. One specimen from the Alambari river was a natural triploid and had... Tipo: Info:eu-repo/semantics/article Palavras-chave: Characidium; Heterochromatin; 18S rDNA; 5S rDNA; Natural triploidy. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200007 Registros recuperados: 1 Primeira ... 1 ... Última

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